The clause in Article VI, Clause 2, of the United States Constitution that declares the Constitution and the laws of the United States which shall be made in pursuance thereof and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land, and the judges in every state shall be bound thereby, anything in the Constitution or laws of any state to the contrary notwithstanding.
A state has never had authority to dishonor an ad prosequendum writ issued by a federal court. Under the Supremacy Clause, U.S. Const. art. VI, cl. 2, the habeas statute-- like any other valid federal measure--overrides any contrary position or preference of the state, a principle regularly and famously reaffirmed in civil rights cases, as in many other contexts. , e.g., Washington v. Wash. State Commercial Passenger Fishing Vessel Ass'n, 443 U.S. 658, 695-96, 99 S. Ct. 3055, 61 L. Ed. 2d 823 (1979).
State interposition to defeat federal authority vanished with the Civil War.
The Supremacy Clause operates in only one direction and has nothing to do with comity: it provides that Congress' enactments ...